Build Your Own Beaver Pipe (aka "Beaver Deceiver") This page illustrates how to build your own "Beaver Pipe" or "Beaver Deceiver" to breach a beaver dam. This is
basically a big pipe that flows through the beaver dam that allows the water to pass. The logic is that beavers are
attracted instinctively to the sound of running water. They aren't "smart" enough to see water draining through a pipe
and try to plug up the ends.
Stuff you will need for this project:
1) A length of pipe, the longer and the larger the diameter (within reason) the better. It seems that perforated PVC pipe
and polyethylene drainage pipe. I had a length of 6" drainage pipe left over from the previous owner, so since I am
cheap I just used that. I would have wished it was a little wider, but lets try it.
2) A couple of 4 foot sections of rebar to anchor the pipe
3) Some nylon rope to anchor the pipe to the rebar
4) 2 pound sledge hammer to driver the rebar
This is the location for my beaver pipe. This is a pinch point in a small stream that runs behind my house. I believe
this used to be part of a mill (waterwheel perhaps?) in the 1800's. Nowadays, it serves as a nifty place for the local
beavers to build dams and plug up the brook. This then backs up into my goat paddock and the rest of the farm. For
this reason, I really want to keep this brook running. I have already removed the beaver dam that was here (see my
other beaver page here.) However, it isn't necessary to remove the whole dam. It is possible to just cut a trench through
the existing dam and put the pipes through the breach.
It is high summer and the water level is the lowest it will be all year, the perfect time to work on our beaver pipe. The
first step was to get the pipe. Here we have our trusty farmhand Dan lugging 30 feet of polyethylene pipe out to the
I anchored one end of the pipe about 15 feet from the opening of the pinch point with a 4 foot section of rebar and tied
it down securely with some nylon rope.
Next, we snuck this through the rocks and anchored it securely here and there with a few additional stones and
Well, that's pretty much it. So far, so good. As soon as the beavers build their dam back (which they do multiple times
per year) I will update this page to let you know how it is working.